Gylfi Sigurdsson struck twice to surely secure a contract at the end of his loan spell from German club Hoffenheim.

It made it four goals in three games for a player even the Welsh find it hard to sing his name from the terraces.

And to put the gloss on a fine day for Swansea, mighty midget Joe Allen added a third in the 77th minute as the Welshmen scored three goals in a top-flight away game for only a third time, after doing so previously in 1981 and 1982.

It was Fulham’s first home defeat since December 21 and home boss Martin Jol was not a happy man.

He said: “To lose after six games without a defeat at home hurts a lot.

“Now we have got to pick ourselves up and do much better than we did today.”

In contrast, the victory only further improves the glowing CV of Swansea boss Brendan Rodgers, who claimed this victory was better than beating Manchester City last weekend.

“We were phenomenal,” he said. “It was easily our best display of the season.

“Fulham have a tremendous record at home but we were really clinical, putting training plans into action.

“I certainly rate this higher than beating City because of the level of performance and how we reacted to that win.”

Rodgers also had praise for two-goal hero Sigurdsson.

He said: “I knew him when we were both at Reading. I needed a midfield player who could score and he has done that.

“I am not sure what went on at Hoffenheim but the manager who signed him went and he lost his way.

“I could play him at right-back and he would score.

“But I don’t know what will happen at the end of the season.

“We have spoken to his agent but for the moment we are both enjoying the ride.”

This really was a golden day for Swansea, who have previously find it hard to score more than one goal in matches.

You wonder what they could achieve if they could find a goalscoring machine.

Yet you can’t deny their eye-catching football.

They arrived on a high after their 1-0 win over Premier League leaders Manchester City last weekend.

And they continued their impressive form at Craven Cottage yesterday, showing they are more than just a dangerous team on home soil.

The Swans have won two of their last three on the road and three of the last five.

Fulham’s defeat at Aston Villa last week ended a run of three straight wins, which had fuelled a lofty rise up the table. And yesterday they found it hard to put a decent move together.

Swansea were content to wait their chance and pick Fulham off.

Allen was tireless once more in their midfield, while Scott Sinclair and Wayne Routledge were always ready to work the flanks.

Fulham needed to defend deep on many occasions, often relying on a long ball to get them out of trouble.

Clint Dempsey’s sparkling form came to prominence when a mazy run ended with Michel Vorm tipping over his second-minute shot.

Swansea, weaving their usual attractive football, put together a menacing movement in the 29th minute with Sigurdsson driving just wide of a post from Angel Rangel’s pass.

A minute later, Mark Schwarzer palmed out Sinclair’s effort as Swansea turned up the heat.

It was no surprise when they took the lead in the 36th minute when Routledge whipped over a deep cross from the right, Sinclair touched back and Sigurdsson headed in.

The Icelander was there again in the 67th minute when he took a return pass from Routledge to sweep home.

Swansea continued to surge forward and Fulham were making horror mistakes in defence.

Typical was a poor clearance from Phillipe Senderos, which allowed Sinclair to collect the ball and sweep wide for Allen, who side-stepped inside and shot home in the 71st minute.

Sinclair blasted over in the dying minute finishing a move of bewildering Swansea passes that had their fans crowing.